package com.xuecheng.content.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.xuecheng.base.exception.XueChengPlusException;
import com.xuecheng.base.model.PageParams;
import com.xuecheng.base.model.PageResult;
import com.xuecheng.content.mapper.CourseBaseMapper;
import com.xuecheng.content.mapper.CourseCategoryMapper;
import com.xuecheng.content.mapper.CourseMarketMapper;
import com.xuecheng.content.model.dto.AddCourseDto;
import com.xuecheng.content.model.dto.CourseBaseInfoDto;
import com.xuecheng.content.model.dto.EditCourseDto;
import com.xuecheng.content.model.dto.QueryCourseParamsDto;
import com.xuecheng.content.model.po.CourseBase;
import com.xuecheng.content.model.po.CourseCategory;
import com.xuecheng.content.model.po.CourseMarket;
import com.xuecheng.content.service.CourseBaseInfoService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.List;

/**
 * @author 摆渡人
 * @description
 * @date 2023/7/4 16:23
 */
@Slf4j
@Service
public class CourseBaseInfoServiceImpl implements CourseBaseInfoService {

    @Autowired
    private CourseBaseMapper courseBaseMapper;
    @Autowired
    private CourseCategoryMapper courseCategoryMapper;
    @Autowired
    private CourseMarketMapper courseMarketMapper;


    @Override
    public PageResult<CourseBase> queryPageCourseBaseInfo(PageParams pageParams, QueryCourseParamsDto courseParamsDto) {
        //构建查询条件对象
        LambdaQueryWrapper<CourseBase> queryWrapper = new LambdaQueryWrapper<>();
        //构建查询条件，根据课程名称查询
        queryWrapper.like(StringUtils.isNotEmpty(courseParamsDto.getCourseName()), CourseBase::getName, courseParamsDto.getCourseName());
        //构建查询条件，根据课程审核状态查询
        queryWrapper.eq(StringUtils.isNotEmpty(courseParamsDto.getAuditStatus()), CourseBase::getAuditStatus, courseParamsDto.getAuditStatus());
        //构建查询条件，根据课程发布状态查询
        queryWrapper.eq(StringUtils.isNotEmpty(courseParamsDto.getPublishStatus()), CourseBase::getStatus, courseParamsDto.getPublishStatus());

        //分页对象
        Page<CourseBase> page = new Page<>(pageParams.getPageNo(), pageParams.getPageSize());
        // 查询数据内容获得结果
        Page<CourseBase> pageResult = courseBaseMapper.selectPage(page, queryWrapper);
        // 获取数据列表
        List<CourseBase> list = pageResult.getRecords();
        // 获取数据总数
        long total = pageResult.getTotal();
        // 构建结果集
        return new PageResult<>(list, total, pageParams.getPageNo(), pageParams.getPageSize());
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public CourseBaseInfoDto createCourseBase(Long companyId, AddCourseDto addCourseDto) {
        // 课程信息表
        CourseBase courseBase = new CourseBase();
        BeanUtils.copyProperties(addCourseDto, courseBase);
        courseBase.setCompanyId(companyId);
        courseBase.setCreateDate(LocalDateTime.now());
        // 审核状态默认为未提交
        courseBase.setAuditStatus("202002");
        // 发布状态默认为未发布
        courseBase.setStatus("203001");
        int insert = courseBaseMapper.insert(courseBase);
        if (insert <= 0) {
            throw new RuntimeException("添加课程失败");
        }

        // 课程营销表
        CourseMarket courseMarket = new CourseMarket();
        BeanUtils.copyProperties(addCourseDto, courseMarket);
        courseMarket.setId(courseBase.getId());
        int i = saveCourseMarket(courseMarket);
        if (i <= 0) {
            throw new RuntimeException("保存课程营销信息失败");
        }
        //查询课程基本信息及营销信息并返回
        return getCourseBaseInfo(courseBase.getId());

    }

    /**
     * 保存课程营销信息
     *
     * @param courseMarketNew 课程营销信息
     * @return >0表示成功
     */
    private int saveCourseMarket(CourseMarket courseMarketNew) {
        //收费规则
        String charge = courseMarketNew.getCharge();
        if (StringUtils.isBlank(charge)) {
            throw new RuntimeException("收费规则没有选择");
        }
        //收费规则为收费
        if (charge.equals("201001")) {
            if (courseMarketNew.getPrice() == null || courseMarketNew.getPrice() <= 0) {
                throw new RuntimeException("课程为收费价格不能为空且必须大于0");
            }
        }
        //根据id从课程营销表查询
        CourseMarket courseMarketObj = courseMarketMapper.selectById(courseMarketNew.getId());
        if (courseMarketObj == null) {
            return courseMarketMapper.insert(courseMarketNew);
        } else {
            BeanUtils.copyProperties(courseMarketNew, courseMarketObj);
            courseMarketObj.setId(courseMarketNew.getId());
            return courseMarketMapper.updateById(courseMarketObj);
        }
    }

    /**
     * 根据课程id查询课程基本信息，包括基本信息和营销信息
     *
     * @param courseId 课程id
     * @return 课程基本信息
     */
    public CourseBaseInfoDto getCourseBaseInfo(long courseId) {
        CourseBase courseBase = courseBaseMapper.selectById(courseId);
        if (courseBase == null) {
            return null;
        }
        CourseMarket courseMarket = courseMarketMapper.selectById(courseId);
        CourseBaseInfoDto courseBaseInfoDto = new CourseBaseInfoDto();
        BeanUtils.copyProperties(courseBase, courseBaseInfoDto);
        if (courseMarket != null) {
            BeanUtils.copyProperties(courseMarket, courseBaseInfoDto);
        }

        //查询分类名称
        CourseCategory courseCategoryBySt = courseCategoryMapper.selectById(courseBase.getSt());
        courseBaseInfoDto.setStName(courseCategoryBySt.getName());
        CourseCategory courseCategoryByMt = courseCategoryMapper.selectById(courseBase.getMt());
        courseBaseInfoDto.setMtName(courseCategoryByMt.getName());

        return courseBaseInfoDto;
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public CourseBaseInfoDto modifyCourseBase(Long companyId, EditCourseDto editCourseDto) {
        //课程id
        Long courseId = editCourseDto.getId();
        CourseBase courseBase = courseBaseMapper.selectById(courseId);
        if (courseBase == null) {
            XueChengPlusException.cast("课程不存在");
        }

        //校验本机构只能修改本机构的课程
        if (!courseBase.getCompanyId().equals(companyId)) {
            XueChengPlusException.cast("本机构只能修改本机构的课程");
        }

        //封装基本信息的数据
        BeanUtils.copyProperties(editCourseDto, courseBase);
        courseBase.setChangeDate(LocalDateTime.now());

        //更新课程基本信息
        int i = courseBaseMapper.updateById(courseBase);
        if (i <= 0) {
            throw new RuntimeException("保存课程营销信息失败");
        }

        //封装营销信息的数据
        CourseMarket courseMarket = new CourseMarket();
        BeanUtils.copyProperties(editCourseDto, courseMarket);
        saveCourseMarket(courseMarket);
        //查询课程信息
        return this.getCourseBaseInfo(courseId);
    }

    @Override
    public void deleteCourse(Long courseId) {
        // 只有处于未提交['202002']的才能删除
        courseBaseMapper.deleteCourse(courseId, "202002");
    }
}
